Method for signaling in a cellular telecommunications network

Abstract

A signaling method for implementation by a base station controlling at least one cell of a network attached to at least one terminal, uniquely identified on this cell by a dedicated temporary network identifier, is provided. It may comprise allocating an open temporary network identifier to an interferer terminal identified by the base station as being capable of interfering with at least one communication established by another terminal attached to this cell or a neighbor cell, publishing this open temporary network identifier and sending a first physical control channel according to a predetermined format to the interferer terminal comprising a condensed representation of the open identifier, this first channel coded using the dedicated temporary network identifier of the interferer terminal. The method may comprise sending a second physical control channel to the interferer terminal allocating it transmission resources over the cellular network, coded using the open temporary network identifier.

The invention claimed is: 
     
       1. A signaling method for implementation by a base station of a cellular telecommunications network, this base station controlling at least one cell of the network to which is attached at least one terminal uniquely identified on this cell by a dedicated temporary network identifier, the signaling method comprising:
 allocating an open temporary network identifier, to an interferer terminal identified by the base station from among said at least one terminal attached to the cell as being capable of interfering with at least one communication established by another terminal attached to this cell or to a neighbor cell of this cell; 
 publishing this open temporary network identifier; 
 sending a first physical control channel according to a predetermined format to the interferer terminal comprising a condensed representation of the open temporary network identifier allocated to the interferer terminal, this first physical channel being coded using the dedicated temporary network identifier of the interferer terminal; and 
 sending a second physical control channel to the interferer terminal allocating it transmission resources over the cellular network, this second channel being coded using the open temporary network identifier. 
 
     
     
       2. The signaling method according to  claim 1 , wherein the process of publishing the open temporary network identifier comprises broadcasting this identifier to the terminals attached to said cell and/or to the terminals attached to at least one other cell controlled by the base station and neighbor of said cell. 
     
     
       3. The signaling method according to  claim 1 , wherein the publishing of the open temporary network identifier comprises broadcasting this identifier to at least one other base station controlling a neighbor cell of the cell. 
     
     
       4. The signaling method according to  claim 1 , further comprising broadcasting a message on said cell comprising a correspondence between the open temporary network identifier and its condensed representation. 
     
     
       5. The signaling method according to  claim 1 , further comprising sending a dedicated signaling message to the interferer terminal managed by a radio resource management layer, this dedicated signaling message comprising a correspondence between the open temporary network identifier and its condensed representation. 
     
     
       6. The signaling method according to  claim 1 , wherein the format of the first physical control channel comprises a field containing a sequence of predetermined bits. 
     
     
       7. The signaling method according to  claim 1 , wherein the format of the first physical control channel comprises a number of bits less than a format of the second physical control channel. 
     
     
       8. The signaling method according to  claim 1 , wherein the cellular telecommunications network is an LTE (Long Term Evolution) network and:
 the open temporary network identifier and the dedicated temporary network identifier allocated to the interferer terminal are identifiers of RNTI (Radio Network Temporary Identifier) type; and 
 the first and the second physical control channel are PDCCH channels (Physical Downlink Control CHannel). 
 
     
     
       9. The signaling method according to  claim 5 , wherein the dedicated signaling message is an RRC (Radio Resource Control) signaling message. 
     
     
       10. A computer having stored thereon instructions which, when executed by the computer, cause the computer to perform the signaling method of  claim 1 . 
     
     
       11. A non-transitory data storage medium readable by a computer on which is stored a computer program comprising instructions for executing the steps of the signaling method according to  claim 1 . 
     
     
       12. A base station of a cellular telecommunications network, controlling at least one cell of the network to which is attached at least one terminal uniquely identified on this cell by a dedicated temporary network identifier, this base station comprising a processor and a memory, wherein the processor:
 allocates an open temporary network identifier to an interferer terminal identified from among said at least one terminal attached to the cell as being capable of interfering with at least one communication established by another terminal attached to this cell or to a neighbor cell; 
 publishes this open temporary network identifier; 
 sends a first physical control channel according to a predetermined format to the interferer terminal, comprising a condensed representation of this open temporary identifier, such that said first physical channel can be coded using the dedicated temporary network identifier of the interferer terminal; and 
 sends a second physical control channel to the interferer terminal allocating it transmission resources over the cellular network, such that said second physical channel can be coded using the open temporary network identifier allocated to the interferer terminal. 
 
     
     
       13. A communication method for implementation by an interferer terminal attached to a cell of a cellular telecommunications network and uniquely identified in this cell by a dedicated temporary network identifier, said cell being controlled by a base station, and the interferer terminal being capable of interfering with at least one communication established by another terminal of said cell or of a neighbor cell to this cell, the communication method comprising:
 decoding a first physical control channel using the dedicated temporary network identifier, this first physical control channel having a predetermined format and comprising a condensed representation of a open temporary network identifier allocated to the interferer terminal by the base station and published or intended to be published by the latter; 
 on detection of the predetermined format of the first physical control channel:
 determining the open temporary network identifier allocated to the interferer terminal from said condensed representation contained in the first physical channel; and 
 decoding a second physical control channel using the open temporary network identifier thus determined, this second physical control channel allocating transmission resources for transmission over the cellular network to the interferer terminal; and 
 
 using the transmission resources allocated in this second channel to communicate over the cellular network. 
 
     
     
       14. A terminal attached to a cell of a cellular telecommunications network and uniquely identified on this cell by a dedicated temporary network identifier, said cell being controlled by a base station and said interferer terminal being capable of interfering with at least one communication established by another terminal attached to said cell and/or to a neighbor cell to said cell, said terminal comprising a processor and a memory, wherein the processor:
 decodes a first physical control channel using the dedicated temporary network identifier, this first physical control channel having a predetermined format and comprising a condensed representation of an open temporary network identifier allocated to the interferer terminal by the base station, and published or intended to be published by the latter; 
 on detection of the predetermined format of the first physical control channel, determines the open temporary network identifier from the condensed representation contained in the first physical control channel; 
 on detection of the predetermined format of the first physical control channel, decodes a second physical control channel using the determined open temporary network identifier, this second physical control channel allocating transmission resources over the cellular network to the interferer terminal; and 
 uses the transmission resources allocated in this second channel for communicating over the cellular network. 
 
     
     
       15. A system of a cellular telecommunications network comprising:
 a base station according to  claim 12  controlling at least one cell of the cellular telecommunications network; 
 an interferer terminal according to  claim 14  attached to said cell; and 
 a terminal interfered on by said interferer terminal, said interfered terminal being attached to the cell of the interferer terminal or to a neighbor cell of the network, and able to implement an interference cancellation technique using the open temporary network identifier allocated to the interferer terminal and published by the base station. 
 
     
     
       16. The signaling method according to  claim 1 , wherein the dedicated temporary network identifier is reserved to the interferer terminal and uniquely identifies the interferer terminal on the cell controlled by the base station. 
     
     
       17. The base station according to  claim 12 , wherein the dedicated temporary network identifier is reserved to the interferer terminal and uniquely identifies the interferer terminal on the cell controlled by the base station. 
     
     
       18. The communication method according to  claim 13 , wherein the dedicated temporary network identifier is reserved to the interferer terminal and uniquely identifies the interferer terminal on the cell controlled by the base station. 
     
     
       19. The terminal according to  claim 14 , wherein the dedicated temporary network identifier is reserved to the interferer terminal and uniquely identifies the interferer terminal on the cell controlled by the base station.